Volume 71, No. 1, March 2026

STUDIA UBB MATHEMATICA, Volume 71 (LXXI), No. 1, March 2026

Volume 71, No.1, March 2026, ISSUE DOI: 10.24193/subbmath.2026.1.
The volume can also be found in the Archive of the Studia UBB Mathematica official website: https://www.cs.ubbcluj.ro/~studia-m/index.php/journal.

DOI: https://doi.org/10.24193/subbmath.2026.1

Published: 2026-03-06

Full Issue

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Articles

Completely inert subgroups of abelian groups

Andrey R. CHEKHLOV, Peter V. DANCHEV

3-15
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Generalization and refinement of fractional Hermite-Hadamard type inequalities for m−convex functions

Muhammad BILAL, Asif R. KHAN

17-33
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Hermite–Hadamard type inequalities via (h,m)-convexity

Akhtar ABBAS, Péter KÓRUS, Shahid MUBEEN

35-48
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Analysis of the HIV/AIDS transmission dynamics model using Caputo fractional-order derivative

Boukary OUEDRAOGO, Nour Eddine ALAA, Elisée GOUBA, Soumaye HARO

49-72
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On a specific ratio-cosine Hardy-Hilbert-type integral inequality in the entire plane

Christophe CHESNEAU

73-82
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Sharp inverse logarithmic coefficient bounds for starlike functions associated with cosine function

Isha ZAHID, Umar RAZA, Mohsan RAZA

83-92
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Global existence, asymptotic behavior, and blow-up for a parabolic p-Laplacian type equation with complex interactions at the boundary

Abdelkader EL MINSARI, Anass OURRAOUI

93-112
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Logarithmic Sobolev inequality in the variable exponent setting and its applications to hyperbolic differential equations with a logarithmic source term

Mykola YAREMENKO

113-133
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Summation process of monotone and sublinear operators in B−statistical sense

Mustafa GÜLFIRAT, Nilay ŞAHIN BAYRAM

135-144
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Fixed points and dynamic programming in complex-valued controlled metric spaces

Liliana GURAN, Muhammad SUHAIL ASLAM, Mohammad Showkat RAHIM CHOWDHURY, Thabet ABDELJAWAD

145-162
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A new computational method based on the Picard iteration method for solving boundary optimal control problems governed by PDEs with two-point boundary conditions

Karim BENALIA, Karim BEDDEK, Thiziri SIFAOUI, Brahim OUKACHA

163-176
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